#428BE5#428BE5

#428BE5 is a light, vivid cyan. Relative luminance 0.253; OKLCH L 63.4% C 0.154 H 255.2°. Best body text is #000000 at 6.06:1 contrast (WCAG AA passes).

Color values

HEX	#428BE5
RGB	rgb(66, 139, 229)
HSL	hsl(213, 76%, 58%)
HSV	hsv(213, 71%, 90%)
CMYK	cmyk(71.2%, 39.3%, 0%, 10.2%)
CIE-LAB	lab(57.35, 6.83, -52.22)
CIE-LCH	lch(57.35, 52.67, 277.45°)
OKLab	oklab(63.38% -0.0395 -0.1489)
OKLCH	oklch(63.38% 0.154 255.2)
XYZ	xyz(25.6170, 25.2778, 77.6426)
Luminance	0.2528 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BE5 #E59C42

analogous

#42DCE5 #428BE5 #4A42E5

triadic

#428BE5 #E5428B #8BE542

tetradic

#428BE5 #E542DC #E59C42 #42E54A

square

#428BE5 #E542DC #E59C42 #42E54A

split-complementary

#428BE5 #E54A42 #DCE542

monochromatic

#154F98 #1C6CCE #428BE5 #78ACEC #AECDF4

Accessibility & contrast

On white

3.47

#428BE5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.06

#428BE5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BE5

6.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BE5	#FFFFFF	#000000	##000000
##428BE5	1.00	3.47	6.06	6.06
#FFFFFF	3.47	1.00	21.00	21.00
#000000	6.06	21.00	1.00	1.00
##000000	6.06	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6192E9

Deuteranopia (green-blind)

#4783E3

Tritanopia (blue-blind)

#00A0AD

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #428be5;
/* rgb */ color: rgb(66, 139, 229);
/* oklch */ color: oklch(63.4% 0.154 255.2);

Tailwind

colors: {
  custom: {
    50: '#89acee',
    500: '#428be5',
    950: '#000000',
  },
}

SCSS

$custom: #428be5;
$custom-light: #89acee;
$custom-dark: #000000;

JSON

{
  "hex": "#428be5",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 229
  },
  "hsl": {
    "h": 213.129,
    "s": 75.814,
    "l": 57.843
  },
  "oklch": {
    "l": 0.6338,
    "c": 0.15409,
    "h": 255.2
  },
  "luminance": 0.25281
}

Semantic roles & 50–950 ramp

primary

#428BE5

secondary

#E2C5A1

accent

#9E35F2

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428BE5

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →